jlinde Posted November 20, 2007 Report Share Posted November 20, 2007 This question has probably been up a couple of times before but anyhow as I am doing an overhaul of a 93-94 Northstar I would like to know if I should stay with the old green (here in Sweden most often blue) or change to Dexcool or its red correspondents. It is very easy to do the change now as everything is empty - but is it good? Is the red doing a better job as corrosion inhibitor or is it just lasting longer? 5 years between changes or 2 years for the old green. /Jan L Link to comment Share on other sites More sharing options...
KHE Posted November 20, 2007 Report Share Posted November 20, 2007 This question has probably been up a couple of times before but anyhow as I am doing an overhaul of a 93-94 Northstar I would like to know if I should stay with the old green (here in Sweden most often blue) or change to Dexcool or its red correspondents. It is very easy to do the change now as everything is empty - but is it good? Is the red doing a better job as corrosion inhibitor or is it just lasting longer? 5 years between changes or 2 years for the old green. /Jan L Stay with the green coolant - the coolant passages are plated with the silicates from the green coolant and that will deplete the corrosion inhibitors in the DexCool which means changine the coolant every 2 years/24,000 miles. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Ranger Posted November 20, 2007 Report Share Posted November 20, 2007 Dex just lasts longer, but like Kevin said, you won't gain any benefit. Stick with green. Link to comment Share on other sites More sharing options...
cadman1940 Posted November 27, 2007 Report Share Posted November 27, 2007 Hi may I suggest that you maintain the PH balance just slightly alcaline and you willnot have corrosion issues in the cooling system or between dissimilar metals. Thanks Eric Link to comment Share on other sites More sharing options...
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